from django.db import models
from django.contrib.auth.models import AbstractUser
from django.conf import settings
from itsdangerous import BadData
from itsdangerous import TimedJSONWebSignatureSerializer as TJWSSerializer
# Create your models here.
from meiduo_mall.utils.models import BaseModel
from users import constans


class User(AbstractUser):

    """用户模型类"""
    mobile = models.CharField(max_length=11, unique=True, verbose_name='手机号')
    #给用户模型多加一个邮箱是否验证的字段
    email_active = models.BooleanField(default=False, verbose_name='邮箱验证状态')
    #用户默认地址
    default_address = models.ForeignKey('Address', related_name='users', null=True, blank=True, on_delete=models.SET_NULL, verbose_name='默认地址')

    class Meta:

        db_table = 'tb_users'
        verbose_name = '用户'
        verbose_name_plural = verbose_name


    def generate_verify_email_url(self):

        """生成验证邮箱url"""
        #1创建用来签名的序列化
        serializer = TJWSSerializer(settings.SECRET_KEY, expires_in=constans.VERIFY_EMAIL_TOKEN_EXPIRES)
        #2定义签名的数据
        data = {
            'id':self.id,
            'username':self.username
        }
        #3签名
        token = serializer.dumps(data).decode()

        verify_url = 'http://www.meiduo.site:8080/success_verify_email.html?token=' + token

        return verify_url

    @staticmethod
    def check_verify_email_token(token):

        """校验邮箱验证token"""
        # 1创建用来签名的序列化
        serializer = TJWSSerializer(settings.SECRET_KEY, expires_in=constans.VERIFY_EMAIL_TOKEN_EXPIRES)
        #2还原token中的用户数据
        try:
            data = serializer.loads(token)
        except BadData:
            return None
        else:
            user_id = data.get('id')
            username = data.get('username')

        try:
            user = User.objects.get(id=user_id, username=username)

        except User.DoesNotExist:
            return None

        else:

            return user



class Address(BaseModel):
    """
    用户地址
    """
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='addresses', verbose_name='用户')
    title = models.CharField(max_length=20, verbose_name='地址名称')
    receiver = models.CharField(max_length=20, verbose_name='收货人')
    province = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='province_addresses', verbose_name='省')
    city = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='city_addresses', verbose_name='市')
    district = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='district_addresses', verbose_name='区')
    place = models.CharField(max_length=50, verbose_name='地址')
    mobile = models.CharField(max_length=11, verbose_name='手机')
    tel = models.CharField(max_length=20, null=True, blank=True, default='', verbose_name='固定电话')
    email = models.CharField(max_length=30, null=True, blank=True, default='', verbose_name='电子邮箱')
    is_deleted = models.BooleanField(default=False, verbose_name='逻辑删除')

    class Meta:
        db_table = 'tb_address'
        verbose_name = '用户地址'
        verbose_name_plural = verbose_name
        ordering = ['-update_time']
